US11278187B2 - Endoscope head - Google Patents

Endoscope head Download PDF

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Publication number
US11278187B2
US11278187B2 US15/114,056 US201515114056A US11278187B2 US 11278187 B2 US11278187 B2 US 11278187B2 US 201515114056 A US201515114056 A US 201515114056A US 11278187 B2 US11278187 B2 US 11278187B2
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Prior art keywords
endoscope head
head body
lever
albarran lever
pivot member
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US15/114,056
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US20180249894A1 (en
Inventor
Stefan Kolberg
Anh Minh Do
Thomas Viebach
Tilman Schröter
Alex Fett
Harald Huber
Wolfgang Mayer
Marc Henzler
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Digital Endoscopy GmbH
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Digital Endoscopy GmbH
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Assigned to DIGITAL ENDOSCOPY GMBH reassignment DIGITAL ENDOSCOPY GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DO, ANH MINH, FETT, Alex, HENZLER, MARC, HUBER, HARALD, KOLBERG, STEFAN, MAYER, WOLFGANG, Schröter, Tilman, VIEBACH, THOMAS
Publication of US20180249894A1 publication Critical patent/US20180249894A1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00098—Deflecting means for inserted tools
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00101—Insertion part of the endoscope body characterised by distal tip features the distal tip features being detachable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/0011—Manufacturing of endoscope parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00131—Accessories for endoscopes
    • A61B1/00137—End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00174—Optical arrangements characterised by the viewing angles
    • A61B1/00177—Optical arrangements characterised by the viewing angles for 90 degrees side-viewing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments

Definitions

  • the present invention relates to an endoscope head comprising an endoscope head body in which at least one working channel is formed, wherein an Albarran lever capable of being pivoted is provided on the distal side of the endoscope head body.
  • Such an endoscope head body can be used in a duodenoscope, i.e. an endoscope for examining e.g. the esophagus or the duodenum, the bile duct, the gall bladder, the pancreatic duct, the pancreas, etc.
  • a duodenoscope i.e. an endoscope for examining e.g. the esophagus or the duodenum, the bile duct, the gall bladder, the pancreatic duct, the pancreas, etc.
  • duodenoscope With the aid of the duodenoscope, it is possible to reach the duodenum through the esophagus, the stomach and the pyloric orifice.
  • the duodenoscope comprises (lateral) optical means (illumination means and a camera) directed to the side. This can make it difficult to introduce the duodenoscope into the esophagus and advance it therein, since forward viewing is not easily possible. Merely the stomach or the duodenum offers sufficient room to bend the distal end of the duodenoscope by about 90°, thus allowing a forward view.
  • the duodenoscope comprises an Albarran lever which, by pivoting, allows the tools that are being advanced through the working channel to be selectively redirected.
  • the duodenoscope After the duodenoscope has been used, it is subjected to reprocessing (cleaning and disinfection treatment). Such reprocessing has to reliably exclude the transmission of all microorganisms, such as bacteria, viruses, fungi, worms or spores. During reprocessing, the duodenoscope first undergoes manual cleaning so that organic material or chemical residues are completely removed. After cleaning, the duodenoscope is subjected to mechanical disinfection or sterilization.
  • reprocessing cleaning and disinfection treatment
  • At least one working channel is formed in an endoscope head body, with a pivot member actuatable from the proximal side being provided on the distal side of the endoscope head body, and an Albarran lever capable of being pivoted being provided on the distal working channel end portion.
  • the Albarran lever is arranged at the pivot member such that it is displaceable relative to the pivot member.
  • the pivot member is arranged on the distal side of the endoscope head body.
  • the Albarran lever can be separated from the pivot member and, as a consequence, from the endoscope head body.
  • the Albarran lever and the pivot member can form separate assemblies which are detachable from each other.
  • the Albarran lever can be cleaned separately from the pivot member.
  • the design of the endoscope head body is rather simple. Compared to an endoscope head whose Albarran lever remains at the pivot member during cleaning, the endoscope head of the present invention has less undercuts, indentations and other locations where residues could be deposited.
  • the Albarran lever can be detachably mountable to and demountable from the pivot member without the use of tools.
  • the Albarran lever can be attached to the pivot member by a click-on or latching connection, by sufficiently high static friction, by means of a hook device, etc.
  • the Albarran lever can be detachably mountable to and demountable from the pivot member with the use of tools.
  • the Albarran lever can be screwed to the pivot member or can be connected thereto by a splint or a pin, etc.
  • the endoscope head can comprise a cap which can be distally slid onto the endoscope head and in which the Albarran lever is arranged such that it can be pivoted relative to the cap.
  • the Albarran lever can be relatively displaceable at the pivot member, independently from the cap.
  • the endoscope head can comprise a cap which can be distally slid onto the endoscope head and in which the Albarran lever is arranged such that it can be pivoted relative to the cap.
  • the Albarran lever and the cap can form a common assembly which, on the distal side of the endoscope head body, is detachably mountable as a unit.
  • the common assembly consisting of the Albarran lever and the cap can be cleaned separately from the endoscope head body.
  • the common assembly consisting of the Albarran lever and the cap can be designed as an element for single use.
  • both the cap and the Albarran lever can, individually or as a common integrated assembly, be designed as elements for single use; alternatively, both the cap and the Albarran lever can, individually or as a common integrated assembly, be designed as elements for multiple use, which can be cleaned. Since such cleaning is performed separately from the endoscope head body and since there is a high degree of freedom with respect to the more detailed design of both the cap and the Albarran lever, individually or as a common integrated assembly, effective cleaning can be accomplished.
  • the proximally actuatable pivot member can form a common assembly together with a supporting member supporting the axis of the proximally actuatable pivot member.
  • This common assembly is detachable from and mountable to the endoscope head body, wherein in the operational state, the common assembly is surrounded by the cap.
  • the endoscope head body comprising the pivot member; the supporting member assembly; the Albarran lever; and the cap.
  • Each of these common assemblies can be cleaned separately.
  • the proximally actuatable pivot member can be housed in the endoscope head body together with the supporting member supporting the axis of the proximally actuatable pivot member.
  • a construction in which only the pivot member connectable to the Albarran lever projects from the endoscope head body can be adopted.
  • Such an endoscope head body has a compact design so that there are hardly any locations to which residues could possibly adhere.
  • the proximally actuatable pivot member can comprise a force receiving member into which a control wire is fittable.
  • the pivot member can be actuated directly by the control wire.
  • the endoscope head body can comprise a control wire channel through which the control wire fitted into the force receiving member extends.
  • a fitting member provided at the distal end of the control wire and fitted into the force receiving member of the pivot member can be arranged inside the endoscope head body. In this way, the distal end of the control wire is not contaminated since it is always surrounded by the outer wall of the endoscope head body.
  • the control wire channel can be located inside the endoscope head body in such a manner that it is completely separated from and sealed against the surrounding of the endoscope head body.
  • a sealing member can be arranged between the proximally actuatable pivot member and the Albarran lever.
  • the sealing member can, for example, be arranged on the axis of the pivot member.
  • the Albarran lever can be formed as a shovel whose distal end edge can be pivoted about a pivot axis of the pivot member up to a location which, as viewed in the longitudinal direction of the endoscope head body, is provided proximally relative to the pivot axis of the pivot member.
  • the Albarran lever can be formed as a shovel whose inner surface forms an extension portion of the working channel, with the shovel inner surface being curved such that it forms a tangent from the straight working channel end portion of the endoscope head body to the curved working channel extension portion of the Albarran lever.
  • the shovel inner surface can be curved such that the tangent point to the straight working channel end portion of the endoscope head body is located at the proximal end edge of the shovel shape of the Albarran lever.
  • the shovel inner surface can comprise a concavity and, at a proximal start segment, can turn into a straight extension portion in such a manner that the tangent point to the straight extension portion is located in the shovel shape of the Albarran lever at a distance to the proximal end edge of the shovel shape of the Albarran lever.
  • FIG. 1 shows a partly cut-open perspective view of an endoscope head of a first embodiment according to the present invention in an assembled state.
  • FIG. 2 shows a partly cut-open perspective view of the endoscope head of the first embodiment according to the present invention in an extracted state.
  • FIG. 3 shows a perspective view of the endoscope head of the first embodiment according to the present invention in an extracted state viewed from above.
  • FIG. 4 shows a perspective view of the endoscope head of the first embodiment according to the present invention, where a side supporting member is detachable.
  • FIG. 5 shows a perspective view of a cap of the endoscope head of the first embodiment according to the present invention.
  • FIG. 6 shows a perspective view of the endoscope head of the first embodiment according to the present invention from the back.
  • FIG. 7 shows a perspective top view of the endoscope head of the first embodiment according to the present invention, with the cap being detached.
  • FIG. 8 shows a perspective top view of the endoscope head of the first embodiment according to the present invention in an intermediate position in which the cap is being slid onto the endoscope head.
  • FIG. 9 shows a perspective top view of the endoscope head of the first embodiment according to the present invention, with the cap being placed on the endoscope head.
  • FIG. 10 shows a perspective side view of an endoscope head of a second embodiment according to the present invention.
  • FIG. 11 shows a perspective top view of the endoscope head of the second embodiment according to the present invention.
  • FIG. 12 shows a perspective view of the endoscope head of the second embodiment according to the present invention, seen from the proximal side.
  • FIG. 13 shows a cut-open perspective view of the endoscope head of the second embodiment according to the present invention in a state in which the Albarran lever is in a rest position.
  • FIG. 14 shows a cut-open perspective view of the endoscope head of the second embodiment according to the present invention in a state in which the Albarran lever is in an intermediate position.
  • FIG. 15 shows a cut-open perspective view of the endoscope head of the second embodiment according to the present invention in a state in which the Albarran lever is completely swung out.
  • FIGS. 1 to 9 A first embodiment of the present invention will be described below with reference to FIGS. 1 to 9 .
  • FIGS. 1 and 2 shows a perspective view of a first embodiment of an endoscope head according to the invention.
  • FIGS. 1 and 2 show this endoscope head from the side in a partly cut-open perspective view, with the left side of the drawing pointing in the insertion direction of the endoscope head.
  • An endoscope head 1 comprises an endoscope head body 11 having an Albarran lever 2 at its distal end, the Albarran lever 2 being surrounded by a cap 3 .
  • the Albarran lever 2 is arranged such that it can be pivoted relative to the endoscope head body 11 and, for this purpose, is pivoted by means of a pivot lever 45 .
  • the pivot lever 45 is rotatably supported at a side supporting member (supporting member) 4 .
  • the Albarran lever 2 can be slid away from the pivot lever 45 .
  • FIG. 1 shows a view in which the Albarran lever 2 and the pivot lever 45 are in an assembled state.
  • FIG. 2 shows a view in which the pivot lever 45 has been pulled out of the Albarran lever 2 (extracted state).
  • the individual members of the endoscope head 1 will be discussed in detail.
  • the endoscope head body 11 is designed as a cylindrical body and comprises a working channel 13 and a control wire channel 15 , each extending along the longitudinal direction of the endoscope head body 11 and in parallel to each other.
  • the control wire channel 15 guides a subsequently described control wire for operating the Albarran lever 2 .
  • the working channel 13 guides microtools for examining, for example, the esophagus, the duodenum, the bile duct, the gall bladder, the pancreatic duct, the pancreas, etc.
  • the endoscope head body 11 On its outer circumferential surface, the endoscope head body 11 comprises a groove 12 extending in parallel to the proximal end side of the endoscope head body 11 , the groove 12 serving as a locking groove for the cap 3 .
  • the endoscope head body 11 On its distal side, the endoscope head body 11 comprises an extension portion at which a camera 16 and an illumination means 17 are provided in the known manner, as is shown, for example, in FIG. 4 .
  • the endoscope head body 11 At its proximal end, the endoscope head body 11 comprises a cylindrical opening having an inner surface 131 for the working channel 13 .
  • an actual working channel member (not shown) formed as a flexible tube member is arranged.
  • the working channel member When inserted into the endoscope head body 11 , the working channel member extends in the proximal direction and serves for guiding the microtools.
  • a curved portion 133 is provided, as is shown in FIG. 1 .
  • the working channel member (not shown) is inserted into the opening having the inner surface 131 to such an extent that it abuts on a radial contact surface 137 on the proximal side of the curved portion 133 .
  • the working channel 13 comprises the curved portion 133 at which the direction of the working channel 13 starts changing from an approximate straight line to a bending.
  • the curved portion 133 extends in a curved manner to the distal side towards the prolonged center axis of the opening having the inner surface 131 and, in doing so, acts together with a curve-shaped member 432 described later, see FIG. 2 .
  • the Albarran lever 2 capable of being pivoted relative to the endoscope head body 11 is seated at the distal exit of the working channel 13 .
  • the working channel 13 extends further towards the Albarran lever 2 in the distal direction.
  • the Albarran lever 2 comprises an Albarran lever main body 21 which, on the front (proximal) side in FIG. 1 , comprises an Albarran lever fork portion (yoke) 22 into which the pivot lever 45 is inserted for performing the pivoting operation of the Albarran lever 2 .
  • the fork portion 22 comprises two parallel contact surfaces (in FIG. 2 , only the lower contact surface is shown), each of which ends in an insertion surface 221 towards the proximal side.
  • the insertion surface 221 is a surface inclined towards the proximal side. On the distal side, the insertion surface 221 turns into the contact surface 222 .
  • the insertion surfaces 221 (in FIG.
  • the pivot lever 45 serves for inserting the pivot lever 45 into the fork portion 22 .
  • the pivot lever 45 is provided in the fork portion 22 such that it is in contact with at least one of the contact surfaces 222 .
  • the pivot lever 45 comprises a pivot lever arm 452 inserted into the fork portion 22 .
  • the arm 452 of the pivot lever 45 is formed cuboid-like and comprises an upper and a lower insertion surface 453 , as shown in FIG. 2 .
  • the upper and lower insertion surfaces 453 are opposite to each other and extend in the longitudinal direction of the endoscope head body 11 . Only the upper insertion surface 453 is shown in FIG. 2 .
  • the thickness of the arm 452 that is the distance between the upper and lower insertion surfaces 453 facing away from each other, is slightly smaller than the distance between the parallel contact surfaces 222 of the fork portion 22 of the Albarran lever 2 . Therefore, the pivot lever 45 can be inserted into the fork portion 22 of the Albarran lever 2 with ease.
  • the pivot lever arm 452 comprises a rotation shaft 451 which is described hereinafter and about which the pivot lever arm 452 can pivot or rotate.
  • the Albarran lever 2 comprises a working channel surface 24 forming an extension portion of the working channel 13 when the Albarran lever 2 is positioned relative to the endoscope head body 11 , as shown in FIG. 1 .
  • the working channel surface 24 comprises a curvature provided in the extension direction of the endoscope head 1 and ending at a distal end 25 of the working channel surface 24 .
  • the working channel surface 24 is curved inwardly, i.e. it is concave.
  • a tool, such as a guide wire, guided through the working channel 13 is lifted up by the curved portion 133 and comes into contact with the working channel surface 24 of the Albarran lever 2 when being further advanced in the proximal direction.
  • the Albarran lever 2 can be pivoted relative to the endoscope head body 11 .
  • the fulcrum (rotation axis) and the physical design of the Albarran lever 2 are selected such that in the swung-out position of the Albarran lever 2 , the distal end 25 of the working channel surface 24 is located proximally relative to the fulcrum of the Albarran lever 2 , when viewed in the longitudinal direction of the endoscope head body 11 .
  • the cap 3 is formed as a cylinder provided with a bottom.
  • the bottom of the cap 3 is located on the distal side thereof. In an application state, the cap 3 is placed on the endoscope head body 11 . In the area of the bottom, the outside of the cap 3 is rounded such that the requirements for inserting the endoscope head 1 into an object to be examined are fulfilled.
  • the cap 3 comprises an opening 31 which, in FIG. 3 , faces upwards (cf. FIG. 3 ).
  • the opening 31 of the cap 3 forms an open lateral window for the tools guided through the working channel 13 .
  • the cap 3 At its proximal end, the cap 3 has a locking nose 32 which projects inwardly along the overall circumference of the cap 3 and which can have a round or curved shape or any other shape.
  • This locking nose 32 can be locked in the groove 12 of the endoscope head body 11 when the cap 3 is placed on the endoscope head body 11 .
  • the groove 12 comprises a shape corresponding to the shape of the locking nose 32 .
  • the cap 3 comprises a lever holder 34 opposite to the opening 31 , the lever holder 34 being provided as a projection protruding from the inner circumferential surface of the cap 3 , see FIGS. 3 to 5 .
  • the lever holder 34 comprises a bore 35 extending perpendicularly with respect to the longitudinal extension of the cap 3 and having a pivot projection 26 of the Albarran lever 2 inserted therein, as shown in FIG. 5 .
  • the pivot projection 26 of the Albarran lever 2 is on the side of the Albarran lever 2 facing towards the viewer, but has been omitted in these Figures for the sake of simplicity and due to the position of the section of the sectional view.
  • the pivot projection 26 has a cylindrical shape and extends laterally from the fork portion 22 of the Albarran lever 2 .
  • the outer diameter of the pivot projection 26 is selected such that the pivot projection 26 is easily rotatable in the bore 35 of the lever holder 34 .
  • the outer diameter of the pivot projection 26 can be slightly smaller than the inner diameter of the bore 35 .
  • the pivot projection 26 can comprise a slit 27 extending in the longitudinal direction of the pivot projection 26 .
  • the slit 27 facilitates insertion of the pivot projection 26 into the bore 35 of the lever holder 34 since the pivot projection 26 can be slightly compressed inwardly in the area of the slit 27 .
  • the pivot projection 26 can be formed as a solid cylindrical projection.
  • the Albarran lever 2 is integrated into the cap 3 , and both the Albarran lever 2 and the cap 3 form a common assembly and are movable relative to the endoscope head body 11 as a unit.
  • the Albarran lever 2 pivots about the axis of the pivot projection 26 (axis of the bore 35 ) towards the opening 31 of the cap 3 .
  • the side supporting member 4 rotatably supports the pivot lever 45 .
  • the side supporting member 4 comprises an inner member 43 which is a plate member approximately in the shape of a letter L in cross-section, see FIG. 3 .
  • the inner member 43 serves for supporting the pivot lever 45 , with the pivot lever 45 being rotatably supported in the inner member 43 . More precisely, when assembled to the endoscope head body 11 , the inner member 43 extends in parallel to the longitudinal direction of the endoscope head body 11 .
  • the inner member 43 has the shape of an angled plate, wherein the angulation line extends in parallel to the longitudinal direction of the endoscope head body 11 and separates the plate shape of the inner member 43 into a larger plate portion (the upper plate portion in FIG.
  • a material reinforcement portion 433 formed integrally with both the upper, larger plate portion and the lower, smaller plate portion.
  • a receiving bore 44 extends through this reinforcement portion 433 perpendicularly with respect to the extension direction of the inner member 43 .
  • the receiving bore 44 serves as a bearing for the shaft body (rotation axis) 451 of the pivot lever 45 .
  • the cylindrical shaft body 451 of the pivot lever 45 is inserted into the receiving bore 44 of the reinforcement portion 433 .
  • the outer diameter of the shaft body 451 is selected such that the shaft body 451 is easily rotatable in the receiving bore 44 of the reinforcement portion 433 .
  • the outer diameter of the shaft body 451 can be slightly smaller than the inner diameter of the receiving bore 44 .
  • the inner member 43 On the proximal side of the reinforcement portion 433 , the inner member 43 has a curve-shaped member 432 forming a part of the working channel 13 when the inner member 43 is assembled to the endoscope head body 11 , see FIG. 2 . More precisely, the curve-shaped member 432 and the curved portion 133 cooperate to form the bending (curvature) of the working channel, as described above.
  • the inner member 43 has a flat proximal end face 431 .
  • the side supporting member 4 comprises an outer member 41 forming the radial outer side of the side supporting member 4 .
  • the outer member 41 serves as a cover of the side supporting member 4 and has an outwardly bent (convex) shape, as shown in FIG. 3 .
  • the outer member 41 is formed by a bent plate member having a constant wall thickness and the cap 3 can be attached to the outer surface of the outer member 41 .
  • the bent plate member of the outer member 41 has a curved inner surface facing the inner member 43 .
  • the inner surface of the outer member 41 is concave.
  • the outer member 41 has a rectangular shape. At the end surfaces extending in the longitudinal direction, the outer member 41 is in contact with the inner member 43 . More precisely, when looking at FIG.
  • an upper, longitudinally extending end surface of the outer member 41 is in contact with the upper, longitudinally extending end surface of the upper (larger) plate portion of the inner member 43 ; and a lower, longitudinally extending end surface of the outer member 41 is in contact with a lower, longitudinally extending end surface of the base (lower, smaller plate portion) of the inner member 43 , the latter end surface extending away from the upper (larger) plate portion of the inner member 43 .
  • a space or gap 42 is formed, as shown in FIG. 3 .
  • the outer circumferential surface of the outer member 41 is provided with a groove 415 extending in the circumferential direction.
  • the groove 415 is adapted to the shape of the nose 32 of the cap 3 and, together with the groove 12 , serves for allowing locking and holding of the cap 3 .
  • the outer member 41 has a flat proximal end face 411 .
  • the side supporting member 4 is arranged at the endoscope head body 11 in such a manner that the proximal end faces 411 and 431 of the outer member 41 and the inner member 43 are attached to a distally facing attachment surface 19 of the endoscope head body 11 e.g. by gluing.
  • the endoscope head body 11 and the side supporting member 4 can form a common assembly.
  • the side supporting member 4 is arranged at the attachment surface 19 in such a manner that the distal end of the control wire channel 15 opens into the gap 42 .
  • an activation lever 454 is arranged at the cylindrical shaft body 451 of the pivot lever 45 .
  • the activation lever 454 can be mounted on the cylindrical shaft body 451 of the pivot lever 45 in a form-fitting manner, as shown in FIG. 6 .
  • Other ways of attaching the activation lever 454 to the cylindrical shaft body 451 of the pivot lever 45 are possible.
  • the activation lever 454 can, for example, be glued onto the end of the cylindrical shaft body 451 which is opposite to the arm 452 .
  • the outer member 41 and the inner member 43 have been omitted in FIG. 6 .
  • the activation lever 454 is arranged in the gap 42 between the outer member 41 and the inner member 43 .
  • the gap 42 is a closed space defined between the outer member 41 , the inner member 43 , the attachment surface 19 , and a distal cover not shown in the Figures.
  • the distal cover sealingly closes the gap 42 on the distal side of the outer member 41 and the inner member 43 .
  • the activation lever 454 On its side opposite to the shaft body 451 , the activation lever 454 comprises a control wire barrel receiving member 455 into which a barrel of a control wire (not shown) is inserted.
  • the control wire is activated from the proximal side of the endoscope head 1 , for example by a control member, such as a joystick.
  • the activation lever 454 When the control wire is pulled by the control member, the activation lever 454 is pivoted (rotated) about its fulcrum formed in the shaft body 451 .
  • the control wire proximally extends from the barrel inserted into the control wire barrel receiving member 455 through the gap 42 between the outer member 41 and the inner member 43 into the control wire channel 15 of the endoscope head body 11 , and from there further through a catheter of the endoscope to the control member.
  • the control wire barrel receiving member 455 forms a force receiving member for receiving the force applied to the control wire and transmitting it to the pivot lever 45 .
  • the sealing ring 5 is shown in FIG. 6 .
  • the sealing ring 5 has the function to seal between the pivot member 45 and the Albarran lever 2 . In other words, the sealing ring 5 seals the gap 42 .
  • FIGS. 7 to 9 schematically show how the cap 3 is placed on the endoscope head body 11 .
  • the cap 3 is shown transparently.
  • FIG. 7 shows a perspective top view of the endoscope head in a situation where the cap 3 is separated from the endoscope head body 11 and the side supporting member 4 .
  • the cap 3 is rotated by the user such that the fork portion 22 of the Albarran lever 2 is directed towards and aligned with the distally extending arm 452 .
  • the cap 3 and the endoscope head body 11 can, e.g., be provided with a marking provided at the respective outer surface.
  • the cap 3 is slid in the proximal direction onto the endoscope head body 11 and, thus, also the fork portion 22 of the Albarran lever 2 is slid onto the arm 452 , see FIGS.
  • the arm 452 is inserted into the fork portion 22 in such a manner that its upwards and downwards directed insertion surfaces 453 face the contact surfaces 222 of the fork portion 22 .
  • the rotation shaft 451 and the pivot projection 26 are aligned axially.
  • the activation lever 454 When the control wire is pulled on the proximal side, the activation lever 454 is pivoted about its fulcrum formed in the shaft body 451 . Analogously, the shaft body 451 and, thus, the arm 452 of the pivot lever 45 rotate (pivot). In turn, the rotation of the pivot lever 45 seated in the fork portion 22 causes the pivoting operation of the Albarran lever 2 .
  • the cap 3 and the Albarran lever 2 form a common assembly which can be separated from the common assembly consisting of the endoscope head body 11 and the side supporting member 4 , the cap 3 and the Albarran lever 2 can be designed as an assembly for single use.
  • the common assembly consisting of the endoscope head body 11 and the side supporting member 4 can easily be cleaned and reprocessed.
  • the common assembly formed by the endoscope head body 11 and the side supporting member 4 of the present invention does not have any undercuts or locations difficult to reach at the Albarran lever itself or at the Albarran lever mounted to the endoscope head body.
  • the rinsing liquid for cleaning can easily flow around the common assembly consisting of the endoscope head body 11 and the side supporting member 4 and can remove foreign particles therefrom.
  • FIGS. 10 to 15 A second embodiment of the present invention will be described below with reference to FIGS. 10 to 15 .
  • FIGS. 10 to 12 show perspective views of the endoscope head body of the second embodiment. Those elements of the second embodiment which are the same as the respective elements of the first embodiment are not further discussed and, if they are shown, have been provided with the same reference signs.
  • the pivot lever according to the second embodiment is not provided in a supporting member separable from the endoscope head body, but is integrated in the endoscope head body.
  • the Albarran lever of the second embodiment is different from the Albarran lever of the first embodiment.
  • An endoscope head 1001 comprises an endoscope head body 1011 having an Albarran lever 1002 arranged at the distal end thereof, the Albarran lever 1002 being surrounded by a cap 1003 .
  • the Albarran lever 1002 is arranged such that it can be pivoted relative to the endoscope head body 1011 and is pivoted by a pivot lever 1045 .
  • the pivot lever 1045 is rotatably supported at the endoscope head body 1011 .
  • the Albarran lever 1002 can be slid away from the pivot lever 1045 .
  • the endoscope head 1001 comprises two common assemblies: the endoscope head body 1011 with the pivot lever 1045 installed therein as a first common assembly, and the cap 1003 with the Albarran lever 1002 installed therein as a second common assembly.
  • these two common assemblies will be described in greater detail.
  • the endoscope head body 1011 is designed as a cylindrical body and comprises a working channel 1013 and a control wire channel 1015 , each extending along the longitudinal direction of the endoscope head body 1011 and in parallel to each other.
  • the control wire channel 1015 guides a control wire 1007 for operating the Albarran lever 1002 .
  • the working channel 1013 guides the microtools for the examinations.
  • the endoscope head body 1011 comprises an extension portion at which a camera 1016 and an illumination means 1017 are provided in the known manner.
  • the endoscope head body 1011 In its central portion, when viewed in the longitudinal direction, the endoscope head body 1011 comprises an opening facing sideways, i.e. extending perpendicular to the longitudinal axis of the endoscope head body 1011 .
  • a rotation shaft 1451 is inserted as a shaft body for the pivot lever 1045 .
  • the opening forms a bearing for the rotation shaft 1451 .
  • the rotation shaft 1451 is sealed, for example, by means of one or more ring seals.
  • the rotation shaft 1451 extends into the inside of the endoscope head body 1011 , in particular into the control wire channel 1015 , see FIG. 13 .
  • the rotation shaft 1451 is provided with an activation lever 1454 mounted on the axis of the rotation shaft 1451 in a form-fitting manner, as shown in FIGS. 13 to 15 .
  • the activation lever 1454 comprises a control wire barrel receiving member 1455 as a force receiving member by which a pulling force of a control wire 1007 can be applied to the activation lever 1454 .
  • a control wire barrel 1071 of the control wire 1007 is inserted into the control wire barrel receiving member 1455 .
  • the control wire barrel receiving member 1455 is formed in the shape of a hook retaining the control wire barrel 1071 rotatable relative to the activation lever 1454 .
  • the rotation shaft 1451 is integrally formed in the flat shape of a cuboid forming the pivot lever 1045 .
  • the pivot lever 1045 and the rotation shaft 1451 are formed as a unit insertable into the endoscope head body 1011 from the outside. From the inside, the activation lever 1454 is slid onto the same.
  • the pivot lever 1045 At its flat cuboid shape, the pivot lever 1045 comprises two surfaces 1453 opposite to each other and extending horizontally in the rest position. At the distal and the proximal end surface of the flat cuboid shape, the pivot lever 1045 is rounded, as shown in FIG. 10 , so that the surfaces 1453 on the distal and the proximal side merge into a respective radius.
  • control wire channel 1015 forms a space which, on the distal side of the endoscope head body 1011 , is sealed against the surrounding.
  • the cap 1003 is formed as a cylinder provided with a bottom, with the bottom of the cap 1003 being located on the distal side and being rounded on the outside such that, when the cap 1003 has been placed on the endoscope head body 1011 , it can be inserted into an object to be examined.
  • the cap 1003 comprises an opening 1031 facing upwards in FIG. 10 .
  • the opening 1031 of the cap 1003 forms an open lateral window for the tools guided through the working channel 1013 .
  • the cap 1003 comprises a lateral bore serving as a bearing for the Albarran lever 1002 .
  • the Albarran lever 1002 is designed like a shovel and has a fulcrum. More particularly, the Albarran lever 1002 comprises an Albarran lever main body 1201 turning into a shovel 1230 on its lower side in FIGS. 12 and 13 . Starting from the Albarran lever main body 1201 , the shovel is bent to one side. On the proximal side, the shovel 1230 has a flat shovel portion 1231 and on the distal side, it has a bent shovel portion 1232 . On the inner side, the flat shovel portion 1231 and the bent shovel portion 1232 form a guiding surface for guiding tools, etc., which are guided from the working channel 1013 towards the Albarran lever 1002 .
  • this guiding surface forms an extension portion of the working channel 1013 .
  • the guiding surface formed of the flat shovel portion 1231 and the bent shovel portion 1232 is an inner surface of the shovel 1230 and is curved concavely.
  • the flat shovel portion 1231 extends tangentially from the bent shovel portion 1232 to the exit of the working channel 1013 .
  • an insertion groove 1210 is provided in the Albarran lever main body 1201 , as shown in FIG. 12 .
  • the insertion groove 1210 extends horizontally i.e. in the longitudinal direction of the endoscope head 1001 .
  • the insertion groove 1210 is defined by two parallel contact surfaces 1222 facing each other, of which only the lower one is shown in FIG. 12 .
  • the upper contact surface is provided on the lower side of an upper portion 1202 of the Albarran lever 1002 .
  • the pivot lever 1045 is inserted into the insertion groove 1210 having the two parallel contact surfaces 1222 . In the inserted state, the pivot lever 1045 is seated in the insertion groove 1210 such that the contact surfaces 1222 of the insertion groove 1210 face the surfaces 1453 of the pivot lever 1045 .
  • the Albarran lever main body 1201 is provided with a pivot projection 1026 in the area of the insertion groove 1210 , the pivot projection 1026 extending from the Albarran lever main body 1201 in the direction opposite to the extension direction of the shovel 1230 .
  • the pivot projection 1026 is formed as a cylinder.
  • the outer diameter of the pivot projection 1026 is selected such that the pivot projection 1026 is easily rotatable in the lateral bore of the cap 1003 serving as a bearing.
  • the outer diameter of the pivot projection 1026 can be slightly smaller than the inner diameter of the lateral bore of the cap 1003 .
  • the pivot projection 1026 of the Albarran lever 1002 is inserted into the lateral bore of the cap 1003 , as is shown in FIG. 10 .
  • the cap 1003 can be placed on the endoscope head body 1011 .
  • the endoscope head body 1011 and the cap 1003 can be provided with a groove/nose similar to the groove 12 and the nose 32 of the first embodiment.
  • a ring projection 1019 at an outer circumference of the endoscope head body 1011 can have such an outer diameter that it is in a firm force fit with the inner diameter of the cap 1003 when the cap 1003 has been slid onto the endoscope head body 1011 .
  • the outer surface of the ring projection 1019 can be provided with grooves or indentations to establish an even stronger force fit with the inner surface of the cap 1003 .
  • the cap 1003 is slid onto the endoscope head body 1011 with the pivot lever 1045 being simultaneously slid into the insertion groove 1210 of the Albarran lever 1002 .
  • the pivot lever 1045 enters into the insertion groove 1210 in such a manner that its upwards and downwards directed insertion surfaces 1453 face the contact surfaces 1222 of the Albarran lever 1002 .
  • the rotation shaft 1451 and the pivot projection 1026 are aligned axially.
  • FIGS. 13 to 15 show the pivoting operation of the Albarran lever of the second embodiment in a situation in which the Albarran lever is in the rest position, in a situation in which the Albarran lever is in an intermediate position, and in a situation in which the Albarran lever is in a position completely swung out.
  • FIG. 13 shows the rest position of the Albarran lever 1002 .
  • the activation lever 1454 extends from the rotation shaft 1451 substantially at a right angle radially to the outside (upwards in FIG. 13 ). In this position, the barrel 1071 of the control wire 1007 does not apply any load to the activation lever 1454 .
  • the shovel 1230 of the Albarran lever 1002 abuts on the endoscope head body 1011 at the distal exit of the working channel 1013 .
  • the activation lever 1454 When the control wire 1007 is pulled on the proximal side, the activation lever 1454 is pivoted about its fulcrum formed in the shaft body 1451 , see the intermediate position in FIG. 14 .
  • the shaft body 1451 and, thus, the pivot lever 1045 rotate (pivot) in a corresponding manner.
  • the rotation (pivoting) of the pivot lever 1045 seated in the insertion groove 1210 of the Albarran lever 1002 in turn causes the pivoting operation of the Albarran lever 1002 .
  • the proximal end of the Albarran lever 1002 moves away from the distal exit of the working channel 1013 at the endoscope head body 1011 .
  • the activation lever 1454 arrives at its completely swung-out end position, see FIG. 15 .
  • the shovel 1230 of the Albarran lever 1002 can be so long that in the end position, the distal end 1025 of the shovel 1230 of the Albarran lever 1002 can be pivoted about the pivot axis 1451 of the pivot member 1045 to such an extent that it arrives at a position which, when seen in the longitudinal direction of the endoscope head body 1011 , is proximally relative to the pivot axis 1451 of the pivot member 1045 .
  • the side supporting member 4 of the first embodiment can be omitted and the pivot member 1045 is integrated in the endoscope head body 1011 , the outer surface of the endoscope head body 1011 exhibits even less undercuts and can consequently be cleaned even more easily.
  • the cap 1003 and the Albarran lever 1002 form a common assembly which can be separated from the endoscope head body 1011 and can be designed as an assembly for single use.
  • the distal end 1025 of the shovel 1230 can be positioned proximally relative to the pivot axis 1451 of the pivot member 1045 , when seen in the longitudinal direction of the endoscope head body 1011 , an exit angle of much more than 90° can be achieved for tools.
  • the user has a much greater scope of operation.
  • the introduction of a tool, for example into the bile duct is significantly facilitated when the endoscope head body is positioned in the duodenum opposite the exit of the bile duct.
  • the endoscope head body 11 of the first embodiment comprises the locking groove as a groove 12 into which the circumferential locking nose 32 engages.
  • the groove 12 it is not necessary for the groove 12 to be provided as a circumferential groove, but it can also extend only at portions of the circumference of the endoscope head body 11 .
  • one or more locking indentations may be provided at the circumference of the endoscope head body 11 .
  • one or more locking projections protruding radially inwards can be provided on the proximal side of the cap, the locking projections being adapted to the locking indentations at the circumference of the endoscope head body 11 with respect to position and shape. In this way, when sliding the cap 3 onto the endoscope head body 11 , an exact positional relation of the cap 3 relative to the endoscope head body 11 can be predefined.
  • the locking groove extends as a circumferential locking groove composed of a groove portion of the groove 12 at the endoscope head body 11 and a groove portion of the groove 415 of the side supporting member 4 .
  • the structure can be modified such that a locking groove is provided only at the circumference of the endoscope head body 11 .
  • the side supporting member 4 is arranged at the endoscope head body 11 in such a manner that the proximal end faces 411 and 431 thereof are glued to the attachment surface 19 .
  • the invention is not limited to such a structure.
  • the side supporting member 4 can also be formed such that on its proximal side, it comprises a locking means for locking with the attachment surface 19 .
  • the attachment surface 19 can comprise distally extending pins which can be inserted into corresponding holes at the proximal end face(s) 411 and/or 431 .
  • the insertion surfaces 453 of the arm 452 and the contact surfaces 222 of the fork portion 22 which, in the installed position of the Albarran lever at the pivot lever, are arranged opposite the insertion surfaces 453 are shown as flat surfaces.
  • the insertion surfaces 453 and the opposing contact surfaces 222 can comprise grooves/indentations adapted to each other and extending in the longitudinal direction of the endoscope head to allow a more exact definition of the positional relation between the insertion surfaces 453 and the contact surfaces 222 .
  • connection between the arm 452 and the fork portion 22 ; the pivot member 1045 and the Albarran lever main body 1201 are possible.
  • the Albarran lever can be attached to the pivot member by means of a click-on or latching connection, by means of sufficiently high static friction between the contact surfaces facing each other, by means of a hook device, etc.
  • the Albarran lever can be screwed to the pivot member or can be connected thereto by a splint or a pin, etc.
  • the guiding surface at the inner surface of the shovel 1230 is formed by the flat shovel portion 1231 and the bent shovel portion 1232 .
  • the flat shovel portion 1231 can be omitted.
  • the Albarran lever 1002 then abuts on the endoscope head body 1011 such that the bent shovel portion 1232 and the distal exit portion of the working channel 1013 are preferably flush without a shoulder, as can be seen on the bottom of FIG. 13 .
  • the shovel inner surface 1232 can be curved such that it forms a tangent from the straight working channel end portion of the endoscope head body 1011 to the curved shovel inner surface 1232 forming the working channel extension portion of the Albarran lever 1002 .
  • the Albarran lever 2 of the first embodiment can be used.
  • the Albarran lever 2 ; 1002 and the cap 3 ; 1003 do not need to form a common assembly.
  • the structure can be selected such that the Albarran lever is relatively displaceable at the pivot member, independently from the cap.
  • the lever holder 34 of the first embodiment and the lateral bore of the second embodiment can then be omitted.
  • the Albarran lever is attached to the pivot member, and then the cap is placed on the endoscope head body.
  • a fork portion such as the fork portion 22
  • an arm such as the arm 452
  • the Albarran lever can be provided on the Albarran lever.
  • the invention cannot only be applied in a duodenoscope.
  • the principle of the invention can also be applied in an ultrasound endoscope.
  • one working channel is shown with an Albarran lever at the end of the working channel.
  • the invention is also applicable in endoscopes comprising a plurality of working channels, each having one Albarran lever at the end of the respective working channel.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Endoscopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
US15/114,056 2015-08-07 2015-12-09 Endoscope head Active 2036-11-17 US11278187B2 (en)

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DE102015113016.5 2015-08-07
DE102015113016.5A DE102015113016B4 (de) 2015-08-07 2015-08-07 Endoskopkopf
PCT/EP2015/079079 WO2017025154A1 (de) 2015-08-07 2015-12-09 Endoskopkopf

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